No, CQS. CQRS is slightly more complicated and decouples everything via a service bus model along with a massive software ghetto lead by Udi Dahan who I personally despise. An excellent marketer but a poor engineer. I've cleaned up two companies who bought into that idea (event sourcing, service bus etc).

Simply a command is something mutative. A query is something not mutative that returns information. There is no further specification other than that.

It doesn't mandate a bus or event queue or publishing model nor whether or not the commands are synchronous or asynchronous.